--- /dev/null
+/* packet-teredo.c v.1.0
+ * Routines for TEREDO packet disassembly
+ * draft-huitema-v6ops-teredo-00.txt
+ * Windows XP Teredo
+ *
+ * Copyright 2003, Ragi BEJJANI - 6WIND - <ragi.bejjani@6wind.com>
+ * Copyright 2003, Vincent JARDIN - 6WIND - <vincent.jardin@6wind.com>
+ *
+ * $Id: packet-teredo.c,v 1.1 2003/08/29 02:27:28 gerald Exp $
+ *
+ * Ethereal - Network traffic analyzer
+ * By Gerald Combs <gerald@ethereal.com>
+ * Copyright 1998 Gerald Combs
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <glib.h>
+#include <epan/packet.h>
+#include <epan/resolv.h>
+#include "ipproto.h"
+#include "prefs.h"
+
+#include "packet-ip.h"
+#include "tap.h"
+
+#define UDP_PORT_TERREDO 3544
+
+static int teredo_tap = -1;
+
+static int proto_teredo = -1;
+static int hf_teredo_orgheader = -1;
+static int hf_teredo_authheader = -1;
+static int hf_teredo_orgport = -1;
+static int hf_teredo_orgaddr = -1;
+
+static gint ett_teredo = -1;
+
+typedef struct {
+ guint16 th_indtyp;
+ guint8 th_cidlen;
+ guint8 th_authdlen;
+ guint64 th_nonce;
+ guint8 th_conf;
+
+ guint8 th_ip_v_hl;
+ guint16 th_header;
+ guint16 th_orgport;
+ guint32 th_iporgaddr;
+} e_teredohdr;
+
+/* Place TEREDO summary in proto tree */
+static gboolean teredo_summary_in_tree = TRUE;
+
+static dissector_table_t teredo_dissector_table;
+//static heur_dissector_list_t heur_subdissector_list;
+static dissector_handle_t data_handle;
+
+/* Determine if there is a sub-dissector and call it. This has been */
+/* separated into a stand alone routine to other protocol dissectors */
+/* can call to it, ie. socks */
+
+
+static void
+decode_teredo_ports(tvbuff_t *tvb, int offset, packet_info *pinfo,proto_tree *tree, int th_header)
+{
+ tvbuff_t *next_tvb;
+
+ next_tvb = tvb_new_subset(tvb, offset, -1, -1);
+
+ if (dissector_try_port(teredo_dissector_table, th_header, next_tvb, pinfo, tree))
+ return;
+
+ call_dissector(data_handle,next_tvb, pinfo, tree);
+}
+
+static void
+dissect_teredo(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
+{
+ proto_tree *teredo_tree;
+ proto_item *ti;
+ int offset = 0;
+ static e_teredohdr teredohstruct[4], *teredoh;
+ static int teredoh_count = 0;
+
+ proto_item *to;
+ proto_tree *teredo_origin_tree;
+
+ teredoh_count++;
+ if(teredoh_count>=4){
+ teredoh_count=0;
+ }
+ teredoh = &teredohstruct[teredoh_count];
+
+ if (check_col(pinfo->cinfo, COL_PROTOCOL))
+ col_set_str(pinfo->cinfo, COL_PROTOCOL, "TEREDO");
+ if (check_col(pinfo->cinfo, COL_INFO))
+ col_clear(pinfo->cinfo, COL_INFO);
+
+ teredoh->th_header = tvb_get_ntohs(tvb, offset);
+ teredoh->th_ip_v_hl = tvb_get_guint8(tvb, offset);
+ teredoh->th_indtyp = 0;
+
+ if ( (teredoh->th_header)== 1 ) {
+ teredoh->th_indtyp = teredoh->th_header;
+ teredoh->th_cidlen = tvb_get_guint8(tvb,offset+2); /*Authentication header octet*/
+ teredoh->th_authdlen = tvb_get_guint8(tvb,offset+3);
+ teredoh->th_nonce = tvb_get_ntohieee_double(tvb, offset+4);
+ teredoh->th_conf = tvb_get_guint8(tvb,offset+12);
+
+ /*Skip over Authentication Header (fixed length-no authentication)*/
+ offset+=13;
+ teredoh->th_header = tvb_get_ntohs(tvb, offset);
+ teredoh->th_ip_v_hl = tvb_get_guint8(tvb, offset);
+
+ if (check_col(pinfo->cinfo, COL_INFO))
+ col_set_str(pinfo->cinfo, COL_INFO,
+ "Teredo : Tunneling IPv6 over UDP through NATs");
+
+ proto_tree_add_uint_hidden(tree, hf_teredo_authheader, tvb, offset-13, 2, teredoh->th_indtyp);
+
+ if (teredo_summary_in_tree) {
+
+ if (teredoh->th_header!=0) {
+ ti = proto_tree_add_protocol_format(tree, proto_teredo, tvb, offset-13, 13,
+ "TEREDO with Authentication encapsulation");
+ }
+
+ } else {
+ ti = proto_tree_add_item(tree, proto_teredo, tvb, offset, 13, FALSE);
+ }
+ }
+
+ if ( (teredoh->th_header)== 0 ) {
+ teredoh->th_orgport=tvb_get_ntohs(tvb, offset+2);
+ tvb_memcpy(tvb, (guint8 *)&teredoh->th_iporgaddr, offset + 4, 4);
+
+ if (check_col(pinfo->cinfo, COL_INFO))
+ col_set_str(pinfo->cinfo, COL_INFO,
+ "Teredo : Tunneling IPv6 over UDP through NATs");
+
+ if (tree) {
+ if (teredo_summary_in_tree) {
+ if (teredoh->th_indtyp==1){
+ to = proto_tree_add_protocol_format(tree, proto_teredo, tvb, offset-13, 13+8,
+ "TEREDO with Authentication and Origin Indicator encapsulation");
+ teredo_tree = proto_item_add_subtree(to, ett_teredo);
+ proto_tree_add_protocol_format(teredo_tree,proto_teredo, tvb,offset-13, 13,
+ "Authentication encapsulation");
+ ti = proto_tree_add_protocol_format(teredo_tree, proto_teredo, tvb, offset, 8,
+ "Origin indicator encapsulation") ;
+ } else {
+ ti = proto_tree_add_protocol_format(tree, proto_teredo, tvb, offset, 8,
+ "TEREDO with Origin indicator encapsulation");
+ }
+ } else {
+ ti = proto_tree_add_item(tree, proto_teredo, tvb, offset, 8, FALSE);
+ }
+
+ teredo_origin_tree = proto_item_add_subtree(ti, ett_teredo);
+
+ proto_tree_add_uint_format(teredo_origin_tree, hf_teredo_orgheader, tvb, offset, 2,
+ teredoh->th_header,
+ "Teredo Origin encapsulation header: 0x%04x",
+ (teredoh->th_header));
+ proto_tree_add_uint_format(teredo_origin_tree, hf_teredo_orgport, tvb, offset + 2, 2,
+ teredoh->th_orgport,
+ "Origin port: %u",
+ ((teredoh->th_orgport)^(0xFFFF)));
+ proto_tree_add_ipv4_format(teredo_origin_tree, hf_teredo_orgaddr, tvb, offset + 4, 4,
+ teredoh->th_iporgaddr,
+ "Origin address: %s",
+ get_hostname((teredoh->th_iporgaddr)^(0xFFFFFFFF)));
+
+ proto_tree_add_uint_hidden(teredo_origin_tree, hf_teredo_orgheader, tvb, offset, 2,
+ teredoh->th_header);
+ proto_tree_add_uint_hidden(teredo_origin_tree, hf_teredo_orgport, tvb, offset+2, 2,
+ ((teredoh->th_orgport)^(0xFFFF)));
+ proto_tree_add_ipv4_hidden(teredo_origin_tree, hf_teredo_orgaddr, tvb, offset + 4, 4,
+ ((teredoh->th_iporgaddr)^(0xFFFFFFFF)));
+ };
+
+ offset+=8; /*Skip over Origin Header*/
+ };
+
+ if ( (hi_nibble(teredoh->th_ip_v_hl) == 6)
+ && ((teredoh->th_indtyp) != 1) ) { /* checking if the first 4 bits = 6 */
+
+ if (tree) {
+ if (teredo_summary_in_tree) {
+ ti = proto_tree_add_protocol_format(tree, proto_teredo, tvb, offset, 0,"TEREDO simple encapsulation ");
+ }
+ }
+
+ offset+=0;
+ }
+
+ decode_teredo_ports(tvb, offset, pinfo, tree, teredoh->th_header /* , teredoh->th_orgport*/);
+ tap_queue_packet(teredo_tap, pinfo, teredoh);
+}
+
+void
+proto_register_teredo(void)
+{
+ static hf_register_info hf[] = {
+
+ { &hf_teredo_authheader,
+ { "Teredo Authentication packet Header","teredo.authheader", FT_UINT16, BASE_DEC, NULL, 0x0,"", HFILL }},
+
+ { &hf_teredo_orgheader,
+ { "Teredo Origin encapsulation header","teredo.orgheader", FT_UINT16, BASE_DEC, NULL, 0x0,"", HFILL }},
+
+ { &hf_teredo_orgport,
+ { "Origin Port", "teredo.orgport", FT_UINT16, BASE_DEC, NULL, 0x0,"", HFILL }},
+
+ { &hf_teredo_orgaddr,
+ { "Origin IPv4 address","teredo.orgaddr", FT_IPv4, BASE_NONE, NULL, 0x0,"", HFILL }},
+
+ };
+
+ static gint *ett[] = {
+ &ett_teredo,
+ };
+
+ proto_teredo = proto_register_protocol("TEREDO Tunneling IPv6 over UDP through NATs",
+ "TEREDO", "teredo");
+ proto_register_field_array(proto_teredo, hf, array_length(hf));
+ proto_register_subtree_array(ett, array_length(ett));
+
+/* subdissector code */
+ teredo_dissector_table = register_dissector_table("teredo","TEREDO ", FT_UINT16, BASE_DEC);
+// register_heur_dissector_list("teredo.heur", &heur_subdissector_list);
+
+}
+
+void
+proto_reg_handoff_teredo(void)
+{
+ dissector_handle_t teredo_handle;
+
+ teredo_handle = create_dissector_handle(dissect_teredo, proto_teredo);
+ data_handle = find_dissector("ipv6");
+ teredo_tap = register_tap("teredo");
+
+ dissector_add("udp.port", UDP_PORT_TERREDO, teredo_handle);
+}
+
git.samba.org / obnox / wireshark / wip.git / commitdiff